code: def test_can_use_cub_oversize_input3(self):
      # full reduction with 2^63-1 elements
      mem = memory.alloc(100)
      max_num = sys.maxsize
      a = cupy.ndarray((max_num,), dtype=cupy.int8, memptr=mem)
      b = cupy.empty((), dtype=cupy.int8)
      assert self.can_use([a], [b], (0,), ()) is None
  
imports: from itertools import combinations
  import unittest
  import sys
  import cupy
  from cupy import _environment
  from cupy import testing
  from cupy._core import _accelerator
  from cupy._core import _cub_reduction
  from cupy.cuda import memory
label_desc: Use image node_id 7 for calling the TestSimpleCubReductionKernelMisc obj's underlying member method code with example usage: obj.test_can_use_cub_oversize_input3() without return types